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%% Number of Partitions %% % Create a datastore from the sample file, |mapredout.mat|, which is the % output file of the |mapreduce| function. ds = datastore('mapredout.mat'); %% % Get the default number of partitions. N = numpartitions(ds) %% % By default, there is only one partition in |ds| because it contains only % one small file. %% % Partition the datastore and return the datastore corresponding to the % first part. subds = partition(ds,N,1); %% % Read the data in |subds|. while hasdata(subds) data = read(subds); end